CM90 Circulation Pump - 17.2GPM - 12V - 3/4" Outlet. CM90 circulation pumps are a line of compact magnetic driven centrifugal pumps which combine high flow rates with very low electric current consumption. Suitable for fresh water, ethylene glycol and salt water circulation. Glass-fiber reinforced PPA body.. Specifications:. System Pressure:-0.3 to 3.0 bar; stationary max. 4.0 bar. Liquid: Water/glycol mixture; max. 60% glycol, fresh and salt water. Motor service life: More than 5,000 hours at nominal voltage, 10,000 start/stops. Interchangeable motor. Dry running: 30 minutes. Dimensions: 244mm L x 120mm W x 150mm H. Weight: 6.6lbs. Capacity: 17.2 GPM. Ports: 3/4"